Australia Post has suspended most postage to the US ahead of new tariffs on low-value parcels, with businesses wanting to ship to American customers now unable to use the government-owned carrier.

Some online retailers had pre-empted issues with sending goods to the US and stopped shipping there in recent weeks, as global postal services described “chaos”.

?From Friday, August 29, parcels valued under $US800 ($1,230) imported into the US will attract tariffs or flat fees.